Take-up mechanism for sewing-machines.



No. 836,849. *PATENTED NOV; 27, 1906.

R; G. WO-ODWARD. TAKE-UP MECHANISM FOR SEWING MACHINES.

APPLICATION FILED APR. 17. 1902 2 8HBETSSHBET 1.

No. 836,849. PATENTED NOV. 27, 1906.

R. G. WOODWARD. TAKE-UP MECHANISM FOR SEWING MACHINES.

APPLICATION FILED APB.17.1902.

'2 SHEETS-SHEET 2 RUSSEL WOODWVARD, OF VVAUKEGAN, ILLINQIS, ASi SIGNOR TO UN ION SPECIAL SEWING MACHINE (10., v()F CHICAGO,

'IION or ILLINOIS;

TAKE-UP MECHANISM Foe SEWING-MACHINES.

Specification of Letters Patent.

z Patented Nov. 27., 1906.

Original application filed February 25, 1828,-Serial No. 671,283. Divided and this application filed April 17, 1902. Serial To II/ZZ/ whom, it may concern.-

Be it known that I, RUSSEL, G. W001)- WARD, a citizen offhe United States, residing atWaukegan, in the county of Lake, State of Illinois, have invented certain new and usefulImprOVem ents in Take-Up Mechanisms for Sewing-Machines, of which the follow' ing-is a description, referencebeing had to the accompanying drawings, and to the let ters and figures of reference marked thereon.

The present application is a division of my application for patent u on, an improvement in sewing-machines, filed February 25, 1898, Serial No. 671,283, patented July 12, 1904., NO. 765,120.

The present invention relates to an improvement in sewing-machines, particularly of the double-chain-stitoh type, in which an underthi'eadcarrying device coop crates with a verticallyreciprocating thread carrying needle to form the stitches, and the present division relates especially to a take-up mechanism, which I have devised, primarily, for useupon the machine which forms the subject-matter of the abovekentitled application, but it will be understood that it may be applicable to other machines.

The invention, therefore, consists in the matters hereinafter described, andreferred to in the appended claims.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a perspective view of a port-ion, of a sewing machine embodying myinvention, the bedplate being removed. Figs. 2, 3, and 4 are detail views of the take-up mechanism, showing the relative positions of needle, looper, take-up, and spreaderin respective positions, as follows: first, when'the needle is just starting to throw out its loop; second,

, when the needle is at its extreme raised position, and, third, when the looper has passed into the needle-loop. 7

' In the drawings, F represents the main or driving shaft; G, the needle-band, the feeddog; P, the ldoper; .Q, the looper-guard finger,

. and 25 the loop-detainer, the-parts being all" constructed and operating in the manner set forth in the aforesaid application.

The loop-detainer 25 has four motions a bodily-forward motion, an oscillating movement at righi angles thereto, a bodily moveprongs 101 102.

, ment the reverse of the first movement, and finally an oscillating. movement the reverseof thesecond movement, the movements being so. timed with respect to the movements of the looper that the loops of needle-thread entered by the looperwill be held back on said looper or forced back -thereon by the detainer until such time as the needle-points in their next descent have passed below the point of the looper'and all danger of the needles cutting their own thread avoided;

' In general, the take-up mechanism which forms the subject-matter of this application isof the Union Special type, but, in details of construction varies;

The take-up cam or disk A resembles gen- ILLI NOIS, A CORPORA- erally the take-up cam shown in Patent No.

299,568, but'in its face has a cut-out portion a for the purpose hereinafter referred to. The thread guiding and detaining wire I), which enters the slot 0, milled into the take-up disk or cam, has three prongs 100, 101, and 102. The one, 100, which engages the bottom of the groove in the take-up cam is the same as in the patent referred to, but the prong which extends over the top has the two fingers or R represents arms between which the takeearn A rotates, and each having near its outer ends a guide-eye for the thread.

In hetravel of the looper-thread through the machine to be finally deposited into the I searp it; asses in the usual way -across the fase of t e 'take-up and is acted upon by it in theioustomary manner, the face of the cam engaging the thread between the guide- .eyes and carngging it up. In the movement .of thetake-up cam or disk the lower prong forces the thread, upon the outer periphery of the take-up afidis ne'X't acted upon by the prong at the 'top ofthe thread guiding and detaining wire and nearest to the back of the machine. This takes up the slack in the lower. thread while the looper is on its backward travel and holds the thread until said prong, which is the shorter one, reaches the cut-out portion a, of the take-up cam or disk, when the thread is released, and then the longer or front prong of the thread guiding and detaining wire retains the thread and takes all the slack out of it when the eye of the looper has reached a point just past the I do left-hand needle and insures that the travel mg loo detainerwill pass underneath the lower t ead. In other Words, the action of the take-up parts is as usual, exceptzthat the thl'eadgllldlng and detaining wire, has two prongsacting upon the thread when it is upon the outer periphery of the take-up. The back one of said twoprongs -is the same as the regular prong shown-in patent above referred to, and thefront prong when the looper is going ahead acts as a check on the lower thread and straighteris it out so the .finger or loop-detainer can pass under the lower thread, which at that time is between -the oods and: front eye of the looper. This chec ing action of the thread takes place while the looper is going forward. The other prong alone cannot produce this result, as it is too fanback when compared with the actlon of the takeup. Unless the thread is straightened out to let the finger under the K thread imperfect work will result.

The operation, of the take-up is shown in Figs. 2, 3, and 4. In Fig. 2am needles are shown as just beginning torise, the looper 'just cor'nmencin its forward movement, and

' the lower threa :wire 100 up onto the periphery of the takeup'cam or disk A andis held back of the prong102v .In Fig. 3 the needles are at the I claim as new, and desire to has been directed by the extreme of their upward movement, the looer 1s forward, and the take-up cam or dis is not acting on the looper-thread at all.

ters Patent,'is 1. A take-up mechanisrnfor sewin machines, comprising thread-guides, a ta e-up cam, with means'for rotatingit, a guidingarm and a retaining-arm, means whereby twofingerson the latter may successively detain the thread upon thetake-up during its rotation; substantially as described.

2. A take-up mechanism for sewing-machines, including. stationary thread-guides a secure by Let-" take-up canr orrdisk rotating between the thread-guides and having a cut-away portion in its periphery, and'a thread guiding and detainmg wire having two prongs,.one-of which has its point above the. outer '-periphcry of said cut-out portion to allow the thread-to slip beyond said point as the latter enters the recess, while the point ofthe second prong extends below the periphery ,of said output portion substantrally as described. i i I 3. A take-up mechanism forse -machines, including stationary thread-guides a take-up cam or disk rotating between the thread-guides and having a groove, and having a cut-away portion in its periphery, of a thread guiding and detaining wlre bearing constantly infsaid groove, and having two prongs, one of which has its point above the outer periphery of said cut-out portion, to

: allow the thread to slip beyond said pointas the latter enters upon the recess, while the: point of the second prong extends below the periphery of said cut-out portion; substantially as described.

I 4. A takeup ,mechanism for sewing-machines, comprising a take-up cam or disk,

stationary thread-guides between which said I take-up cam or disk rotates a thread guiding and detaining wire, and a series of fingers successively engaging andv releasin the thread as the cam or disk moves; su stantially as described.

5. In a sewing-machine having suitable. stitch-forming mechanism including a needle and a looper, stationary'thread-guides, a ro tar-y take-up member engaging the thread between the guides, a thread guiding and detaining member upon which the thread is carried in the movement of the take-up member, and a series offingers successively catching and holding the thread as the cast-off mem; ber raises it upon the face of the take-up member; substantially as. described.

In testimony whereof I affix my signature in presence of two witnesses.

RUSSEL c. WOODWARD.

Witnesses:

CHESTER MoNErL, FRANCIS S. NORTH. 

